O-alkyl-o-pyrazolyl-phosphoric, phosphonic, thionophosphoric and thionophosphonic acid esters

ABSTRACT

O-alkyl-O-pyrazolyl-phosphoric, phosphonic, thionophosphoric and thionophosphonic acid esters, i.e., (alkyl, phenyl and O-alkyl)O-alkyl-O-(1-((alkyl, phenyl and O-alkyl)-O-alkyl-(phosphoryl, phosphonyl, thionophosphoryl and thionophosphonyl))-5-methylpyrazol-3-yl)-phosphoric, phosphonic, thionophosphoric and thionophosphonic acid esters, which possess arthropodicidal, especially acaricidal and insecticidal, properties, and which may be produced by conventional methods.

United States Patent Fest et al.

[ 5] Oct. 24, 1972 [72] Inventors: Christa Fest, Wuppertal-Elberfeld; Ingeborg Hammann; Wolfgang Behrenz, both of Cologne, all of Germany [73] Assignee: Farbenfabriken Bayer Aktiengesellschaft, Leverkusen, Germany [22] Filed: March 5, 1970 [21] Appl.No.: 16,934

I30] Foreign Application Priority Data March 14, 1969 Germany ..P l9 12 972.7

[52] US. Cl. ..260/310 R, 424/200 I51 Int. Cl. ..C07d 49/18, C071" 9/40 [58] Field of Search ..260/310 R [56] References Cited UNITED STATES PATENTS 2,754,244 7/1956 Gysin et al. ..260/310 R 3,216,894 11/1965 Lorenz et al. ..260/310 R 3,232,830 2/1966 Schrader et a1. ..260/310 R FOREIGN PATENTS OR APPLICATIONS 300,741 10/1954 Switzerland ..260/310 R v 300,758 lO/l954 Switzerland ..260/310 R OTHER PUBLICATIONS Abramov et al., .1. Gen. Chem. (USSR) Vol. 38, Page 2715 (1968). QD1.Z6a

Arbuzov et al., Chem. Abst., Vol. 60, Column 4127- 4128 (1964). QD1.A51

Chemical and Engineering News, Vol. 30, No. 43, Pages 4513- 4526 (1952, Oct. 27, 1952) TP1,1418 Zinov Ev et al., J. Gen. Chem. (USSR) Vol. 39, pages 574- 575 (1969)QD1.26

Primary ExaminerNatalie Trousof Attorney-Burgess, Dinklage 8; Sprung 5 7 1 ABSTRACT O-alkyl-O-pyrazolyl-phosphoric, phosphonic, thionophosphoric and thionophosphonic acid esters, i.e., (alkyl, phenyl and O-alkyl)-O-alkyl-O-( l-([alkyl, phenyl and O-alkyl]-O-alkyl-[phosphoryl, phosphonyl,

thionophosphoryl and thionophosphonyl])-5-methylpyrazol-S-yl l-phosphoric, phosphonic, thionophosphoric and thionophosphonic acid esters, which possess arthropodicidal, especially acan'cidal and insecticidal, properties, and which may be produced by conventional methods.

10 Claims, No Drawings O-ALKYL-O-PYRAZOLYL-PHOSPHORIC, PHOSPHONIC, THIONOPHOSPHORIC AND THIONOPHOSPHONIC ACID ESTERS The present invention relates to and has for its objects the provision for particular new O-alkyl-O- pyrazolylphosphoric, phosphonic, thionophosphoric and thionophosphonic acid esters, i.e., (alkyl, phenyl and O-alkyl)-O-alkyl-O-[l-([alkyl, phenyl and O-alkyl]-O-alkyl-[phosphoryl, phosphonyl, thionophosphoryl and thionophosphonyl])--methylpyrazol-3-yl1-phosphoric, phosphonic, thionophosphoric and thionophosphonic acid esters, which possess arthropodicidal, especially insecticidal and acaricidal, properties, active compositions in the form of mixtures of such compounds with solid and liquid dispersible carrier vehicles, and methods for producing such compounds and for using such compounds in a new way especially for combatting pests, e.g., arthropods, especially insects and acarids, with other and further objects becoming apparent from a study of the within specification and accompanying examples.

0,0-dialkyl-O-( 3-methyl-pyrazol-5-yl )-phosphoric or -thiono-phosphoric acid esters, such as 0,0- dimethyl-O-( 3-methyl-pyrazol-5-yl )-thionophosphate A) and 0,0-diethyl-O-( 3-methyl-pyrazol-5-yl thionophosphate (B), are already described in US. Pat. No. 2,754,244 as insecticides and acaricides. These known compounds can be prepared, for example, by reaction of equimolar amounts of the appropriate 0,0- dialkyl-(thiono)-phosphoric acid ester chlorides and 5- methyl-3-hydroxy-pyrazole.

It has now been found, in accordance with the present invention, that the particular new phosphorus acid esters, i.e., O-alkyl-O-pyrazolyl-phosphoric, phosphonic, thionophosphoric and thionophosphonic acid esters, of the formula in which R and R each individually is alkoxy of l to 4 carbon atoms,

R and R each individually is alkyl of l to 4 carbon atoms, alkoxy of l to 4 carbon atoms, or phenyl, and

X and Y each individually is oxygen or sulfur, exhibit strong arthropodicidal, especially insecticidal and acaricidal, properties.

It has been furthermore found, in accordance with the present invention, that the particular new compounds of formula (I) above may be produced by a process which comprises reacting a phosphorus acid ester halide, i.e., a phosphoric, phosphonic, thionophosphoric or thionophosphonic acid diester halide of the formula P-Htll mum 11) in which R, and R (or R and R and X (or Y) are the same as defined above, and

Hal is a halo atom such as chloro, bromo, iodo or fluoro, especially chloro, with 5-methyl-3-hydroxy-pyrazole (III) in the presence of an acid-binding agent.

Surprisingly, the particular new compounds of formula (1) above according to the present invention are distinguished by outstanding insecticidal and acaricidal properties. The instant compounds possess an excellent activity against biting as well as sucking insects. The compounds according to the present invention are clearly distinguished from and superior in effectiveness to the known compounds of analogous constitution and the same type of activity, such as compounds (A) and (B) noted above. The instant compounds also possess a considerably lower toxicity to warm-blooded animals than such close known compounds. The instant compounds according to the present invention therefore represent a valuable contribution to the art.

The course of the production process according to the present invention is illustrated in greater detail by the following reaction scheme:

in which R R P R.,, X, Y and Hal are the same as defined above.

The phosphorus acid ester halides and the methylhydroxy-pyrazole which may be used as starting materials are clearly characterized by formulas (II) and (III) noted above.

Advantageously, in accordance with the present invention, in the various formulas herein:

R and R each individually represents straight and branched chain lower alkoxy of one to four carbon atoms such as methoxy, ethoxy, nand iso-propoxy, n-, iso-, sec.- and tert.-butoxy, and the like, especially C or C alkoxy;

R and R each individually represents straight and branched chain lower alkyl hydrocarbon of l to 4 carbon atoms such as methyl, ethyl, nand iso-propyl, n, iso-, sec.- and tert.-butyl, and the like, especially C, or C alkyl;

straight and branched chain lower alkoxy of l to 4 carbon atoms such as methoxy to tert.-butoxy inclusive as defined above, and the like, and especially C or C, alkoxy; or phenyl; and

X and Y each individually represents oxygen; or

sulfur.

Preferably, R and R each individually is C or C alkoxy; R and R each individually is C or C, alkyl; or C or C, alkoxy; or phenyl; and X and Y each individually is oxygen; or sulfur.

In particular, R and R each individually is C, alkoxy; R and R each individually is C alkyl; or C, alkoxy; or phenyl; and X and Y each individually is oxygen; or sulfur.

The starting compounds of formulas (II) and (III) above are known form the literature and are readily accessible, even on an industrial scale.

As already mentioned above, when carrying out the production reaction according to the present invention, preferably the free S-methyI-S-hydroxy-pyrazole compound (lll) is used, and the reaction is caused to proceed in the presence of an acid-binding agent. For this purpose, practically all customary acid acceptors can be used. Particularly suitable, however, have proved to be alkali metal alcoholates and carbonates, such as sodium or potassium methylate, ethylate and carbonate; tertiary aliphatic, aromatic or heterocyclic amines, for example triethylamine, dimethylaniline, dimethylbenzylamine or pyridine; and the like.

The production process is preferably carried out in the presence of a solvent (this term includes a mere diluent). As such, practically all inert organic solvents, or mixtures thereof, are suitable, such as hydrocarbons, for example benzine, benzene, chlorobenzene' and xylene; ethers, for example diethyl ether, di-n-butyl ether and dioxan; ketones, for example acetone, methylethyl ketone, methylisopropyl ketone and methylisobutyl ketone; and the like. However, particularly good results have been obtained also with lowboiling aliphatic alcohols, for example methanol and ethanol, and especially with nitriles, for example acetonitrile and propionitrile, as well as with dimethyl formamide.

When carrying out the reaction according to the instant production process, the reaction temperature can be varied within a fairly wide range. In general, the reaction is carried out at substantially between about 30 to 7C.

The reactants and the auxiliary agents (i.e., acidbinding agents) are generally used in equimolar amounts.

in the case where the radicals R, and R or R and R.,, are the same, and X is the same as Y, 2 mols of the corresponding phosphoric, phosphonic or thionophosphoric (-phosphonic) acid ester halide of formula (II) above are used advantageously per mol of the methyl-3-hydroxy-pyrazole. Otherwise, first 1 mol of ester halide of the formula is added dropwise, with stirring, to the 5-methyl-3- hydroxy-pyrazole and later, for example after several hours, 1 mol of ester halide of the formula is added to the reaction mixture.

After combining the reactants, it is advantageous to continue stirring the mixture (for example for at least 3 to 7 hours) until the reaction is substantially complete. The process products, i.e., active compounds, are then obtained with particularly good yields and in greater purity.

The phosphoric, phosphonic or thiono-phosphoric phosphonic) acid esters of formula (I) above according to the present invention are in some cases obtained in the form of colorless to yellow-colored, viscous, waterinsoluble oils which, by so-called slight distillation" (that is, longer heating to moderately elevated temperatures under reduced pressure) can be freed from the last volatile components and can in this way be purifled. Some of these products are also crystallizable compounds which can be well purified by recrystallization from the customary solvents.

Advantageously, as already mentioned above, the particular new compounds according to the present invention are distinguished by an outstanding insecticidal and acaricidal effectiveness as well as a distinct herbicidal (pre-emergence) and rodenticidal side-effect. The effect sets in rapidly and is long-lasting. The instant compounds possess only a low phytotoxicity and a concomitantly low mammalian toxicity. For this reason, the active compounds according to the present invention can be applied with marked success in crop protection endeavors and in hygiene practices for the control of noxious sucking and eating insects and Diptera as well as, there and in the veterinary medical field, for the control of mites (Acarina). 1

Particularly to be emphasized in this connection is the excellent effectiveness of the instant compounds against phosphoric-acid-ester-resistant strains of spider mites.

When applied against household pests and pests of stored products, particularly flies, and mosquitoes, the particular new compounds of the present invention are also distinguished by an outstanding residual activity on wood and clay, as well as a good stability to alkali on limed substrates.

To the sucking insects contemplated herein there belong, in the main, aphids (Aphidae) such as the green peach aphid (Myzus persicae), the bean aphid (Daralis fabae), the bird cherry aphid (Rhopalosiphum padi), the

pea aphid (Macrosiphum pisi) and the potato aphid (Macrosiphum solanifolii); further, the currant gall aphid (Cryptomyzus korschelti), the mealy apple aphid (Sappaphis mali), the mealy plum aphid (Hyalopterus arundinis) and the cherry black-fly (Myzus cerasi); in addition, scales and mealybugs (Coccina), for example the Oleander scale (Aspidiotus hederae) and the soft scale (Lecanium hesperidum) as well as the grape mealybug (Pseudococcus maritimus); thrips (Thysanoptera), such as Hercinothripsfemoralis, and bugs, for example the beet bug (Piesma quadrata) the cotton bug (Dysdercus intermedius), the bed bug (Cimex lectularius), the assassin bug (Rhodnius prolixus) and Chagas bug (Triatoma infestans) and, further, cicadas, such as Euscelis bilobatus and Nephotettix bipunctatus; and the like.

In the case of the biting insects contemplated herein, above all there should be mentioned butterfly caterpillars (Lepidoptera) such as the diamond-back moth (Plutella maculipennis), the gipsy moth (Lyma'ntria dispar), the brown-tail moth (Euproctis chrysorrhoea) and tent caterpillar (Malacosoma neustn'a); further, the

cabbage moth (Mamestra brassicae) and the cutworm Agrotis segetum), the large white butterfly (Pieris brassicae), the small winter moth (Cheimatobia brumata), the green oak tortrix moth (Tortrix viridana), the fall armyworm (laphygma frugiperda) and cotton worm (Prodenia litura), further, the ermine moth (Hyponomeuta padella), the Mediterranean flour moth (Ephestia Kllhniella) and greater wax moth (Galleria mellonella); and the like.

Also to be classed with the biting insects contemplated herein are beetles (Coleoptera), for example the granary weevil (Sitophilus granarius Calandra granaria) the Colorado beetle Leptinotarsa decemlineata), the dock beetle (Gastrophysa vin'dula), the mustard beetle (Phaedon cochleariae), the blossom beetle (Meligethes aeneus), the raspberry beetle (Byturus tomentosus), the bean weevil (Bruchidius Acanthoscelides obtectus), the leather beetle (Dermestes fn'schi), the khapra beetle (Trogoderma granarium), the flour beetle (Tribolium castaneum), the northern corn billbug (Calandra or Sitophilus zeamais), the drugstore beetle (Stegobium paniceum), the yellow mealworrn (Tenebrio molitor) and the sawtoothed grain beetle (Oryzaephilus surinamensis), but also species living in the soil, for example wireworms (Agriotes spec.) and larvae of the cockchafer (Melolontha melolontha); cockroaches, such as the German cockroach (Blattella germanica), American cockroach (Periplaneta americana Madeira cockroach (Leucophaea 0r Rhyparobia madeirae), Oriental cockroach (Blatta orientalis), the giant cockroach (Blaberus giganteus) and the black giant cockroach (Blaberus fuscus) as well as Henschoutedenia flexivitta; further, Orthoptera, for example the house cricket (Acheta domesticus); termites such as the eastern subterranean termite (Reticulitermes flavipes) and llymenoptera such as ants, for example the garden ant (Lasius niger); and the like.

The Diptera contemplated herein comprise essentially the flies, such as the vinegar fly (Drosophila melanogaster), the Mediterranean fruit fly (Ceratitis capitata), the house fly (Musca domestica), the little house fly (Fannia canicularis), the black blow fly (Phormia aegina) and bluebottle fly (Calliphora erythrocephala) as well as the stable fly (Stomoxys calcitrans); further, gnats, for example mosquitoes such as the yellow fever mosquito (Aedes aegypti the northern house mosquito (Culex pipiens) and the malaria mosquito (Anopheles stephensi); and the like.

With the mites (Acari) contemplated herein there are classed, in particular, the spider mites (Tetranychidae) such as the two-spotted spider mite (Tetranychus telarius Tetranychus althaeae or Tetranychus urticae) and the European red mite (Paratetranychus pilosus Panonychus ulmi), blister mites, for example the current blister mite (Eriophyes ribis) and tarsonemids, for example the broad mite (Hemitarsonemus latus) and the cyclamen mite (Tarsonemus pallidus); finally, ticks, such as the relapsing fever tick (Ornithodorus moubaza); and the like.

The active compounds according to the instant invention can be utilized, if desired, in the form of the usual formulations or compositions with conventional inert (i.e., plant compatible or herbicidally inert) pesticide diluents or extenders, i.e., diluents or extenders of the type usable in conventional pesticide formulations or compositions, e.g., conventional pesticide dispersible carrier vehicles such as solutions, emulsions, suspensions, emulsifiable concentrates, spray powders, pastes, soluble powders, dusting agents, granules, etc. These are prepared in known manner, for instance by extending the active compounds with conventional pesticide dispersible liquid diluent carriers and/or dispersible solid carriers optionally with the use of carrier vehicle assistants, e.g., conventional pesticide surface-active agents, including emulsifying agents and/or dispersing agents, whereby, for example, in the case where water is used as diluent, organic solvents may be added as auxiliary solvents. The following may be chiefly considered for use as conventional carrier vehicles for this purpose: inert dispersible liquid diluent carriers, including inert organic solvents, such as aromatic hydrocarbons (e.g., benzene, toluene, xylene, etc.), halogenated, especially chlorinated, aromatic hydrocarbons (e.g., chlorobenzenes, etc.), paraffins (e.g., petroleum fractions), chlorinated aliphatic hydrocarbons (e.g., methylene chloride, etc.), alcohols (e.g., methanol, ethanol, propanol, butanol, etc.), amines (e.g., ethanolarnine, etc.), ethers, ether-alcohols, (e.g., glycol monomethyl ether, etc.), amides (e.g., dimethyl forrnamide, etc.), sulfoxides (e.g., dimethyl sulfoxide, etc.), ketones (e.g., acetone, etc.) and/or water; as well as inert dispersible finely divided solid carriers, such as ground natural minerals (e.g., kaolins, alimina, silica, chalk, i.e., calcium carbonate, talc, kieselguhr, etc.) and ground synthetic minerals (e.g., highly dispersed silicic acid, silicates, e.g., alkali silicates, etc.); whereas the following may be chiefly considered for use as conventional carrier vehicle assistants, e.g., surface-active agents, for this purpose: emulsifying agents, such as non-ionic and/or anionic emulsifying agents (e.g., polyethylene oxide esters of fatty acids, polyethylene oxide ethers of fatty alcohols, alkyl sulfonates, aryl sulfonates, etc., and especially alkyl arylpolyglycol ethers, magnesium stearate, sodium oleate, etc.); and/or dispersing agents, such as lignin, sulfite waste liquors, methyl cellulose, etc.

Such active compounds may be employed alone or in the form of mixtures with one another and/or with such solid and/or liquid dispersible carrier vehicles and/or with other known compatible active agents, especially plant protection agents, such as other acaricides and insecticides, or rodenticides, fungicides, herbicides, bactericides, etc., if desired, or in the form of particular dosage preparations for specific application made therefrom, such as solutions, emulsions, suspensions, powders, pastes, and granules which are thus ready for use.

As concerns commercially marketed preparations, these generally contemplate carrier composition mixtures in which the active compound is present in an amount substantially between about 0.1- percent by weight, and preferably 05-90 percent by weight, of the mixture, whereas carrier composition mixtures suitable for direct application or field application generally contemplate those in which the active compound is present in an amount substantially between about 0.0000l 20 percent, preferably 0.01-5 percent, by weight of the rrrixture. Thus, the present invention contemplates over-all compositions which comprise mixtures of a conventional dispersible carrier vehicle such as (l) a dispersible inert finely divided carrier solid, and/or (2) a dispersible carrier liquid such as an inert organic solvent and/or water preferably including a surface-active effective amount of a carrier vehicle assistant, e.g., a surface-active agent, such as an emulsifying agent and/or a dispersing agent, and an amount of the active compound which is effective for the purpose in question and which is generally between about 0.00001-95 percent, and preferably 0.01-95 percent, by weight of the mixture.

The active compounds can also be used in accordance with the well known ultra-lowvolume process with good success, i.e., by applying such compound if normally a liquid, or by applying a liquid composition containing the same, via very effective atomizing equipment, n finely divided form, e.g., average particle diameter of from 50-100 microns, or even less, i.e., mist form, for example by airplane crop spraying techniques. Only up at most about a few liters/hectare are needed, and often amounts only up to about 1 quart/acre, preferably 2-16 fluid ounces/acre, are sufficient. In this process it is possible to use highly concentrated liquid compositions with said liquid carrier vehicles containing from about 20 to about 95 percent by weight of active compound or even the 100 percent active substance alone, e.g., about 20-100 percent by weight of the active compound.

Furthermore, the present invention contemplates methods of selectively killing, combating or controlling pests, e.g., arthropods, i.e., insects and acarids, weeds (especially by pre-emergence technique), and rodents, and more particularly methods of combating at least one of insects and acarids which comprises applying to at least one of correspondingly (a) such insects, (b) such acarids, and (c) the corresponding habitat thereof, i.e., the locus to be protected, a correspondingly combative or toxic amount, i.e., an arthropodicidally, especially insecticidally or acaricidally, effective amount of the particular active compound of the invention alone or together with a carrier vehicle as noted above. The instant formulations or compositions are applied in the usual manner, for instance by spraying, atomizing, vaporizing, scattering, dusting, watering, squirting, sprinkling, pouring, fumigating, and the like.

it will be realized, of course, that the concentration of the particular active compound utilized in admixture with the carrier vehicle will depend upon the intended application. Therefore, in special cases it is possible to go above or below the aforementioned concentration ranges.

The unexpected superiority and outstanding activity of the particular new compounds of the present invention are illustrated, without limitation, by the following examples:

EXAMPLE 1 Plutella test Solvent: 3 parts by weight acetone Emulsifier: 1 part by weight alkylaryi polyglycol ether To produce a suitable preparation of the particular active compound, 1 part by weight of such active compound is mixed with the stated amount of solvent containing the stated amount of emulsifier, and the resulting concentrate is diluted with water to the desired final concentration.

Cabbage leaves (Brassica oleracea) are sprayed with the preparation of the given active compound until dew moist and are then infested with caterpillars of the diamond-back moth (Plutella maculipennis).

After the specified period of time, the degree of destruction is determined as a percentage: percent means that all the caterpillars are killed, whereas 0 per cent means that none of the caterpillars are killed.

1. particular active compounds tested, their concentrations the evaluation time and the results obtained 'can be seen from the following Table l 'IABLE I llntelln test Concentration of Degree of active destruction compound in percent Aetive compound (constitution) in percent alter 3 days 1) 0 CH 0 I \NyCH3 (Known from US. Patent 2,754,244).

(B)... C2H O S 0.1 100 1| 0.01 0 CH 0 -Cli (Known from 11.3. lat01it2,754,244).

l (Jl- S 0.1 100 I) 1 0001 100 l' o We n u Ull I l) (lgllfl) ()llx l (UzlhUhh S (czlhohl ()-'ll l (C2 'Is )z S CH5;POH CzH50 N i N CI1 Cell P- (zil fl l l i/Qlll, -l' ll ()yllni) S TABLE 1 Continued Plutclla tcst Concentration oi Degree of active destruction compound in percent Active compound (constitution) in percent after 3 days l ()H (:gllgl) N '1 N CI 3 l Ulla-l ll (lgllfl) S /1' -o--|T- (.l lIsO N J H N C a CzH -1 ll CQHSO S 1-() Tl 091150 N II l (czl'ls hi (U U. 1 100 o 0.01 100 \ll 0 H O 2 N J-cut l (UzlILUhh 0 4m. 0 0.1 100 0.01 so (UyllgUlL'l' t) N l -(.'ll3 v (ct s hl i 0 (Hi) C113 S 0.1 100 \ll 0.01 100 1O o n o I I N -CH;

EXAMPLE2 Myzus test (contact action) Solvent: Em ulsifier:

3 parts by weight acetone part by weight alkylaryl polyglycol ether To produce a suitable preparation of the particular active compound, 1 part by weight of such active compound is mixed with the stated amount of solvent containing the stated amount of emulsifier, and the resulting concentrate is diluted with water to the desired final concentration.

Cabbage plants (Brassica oleracea) which have been heavily infested with peach aphids (Myzus persicae) are sprayed with the preparation of the given active compound until dripping wet.

After the specified period of time, the degree of destruction is determined as a percentage: 100 percent 10 means that all the aphids are killed, whereas 0 percent means that none of the aphids are killed.

The particular active compounds tested, their concentrations, the evaluation time and the results obtained can be seen from the following Table 2.

TABLE 2 Myzus test.

Concentration of Degree 01' uctivc (lcstruction compound in pcl'ccnl Active compound in pvrccnt nftcr 21 hours (A)... C11 0 S 0.1 0

P-O-g: CHaO N CHa (Known from U.S. Patent 2,754,244)

(12)... CH; S 0.1 100 \1] 0. 01 100 /P-O 0.001 60 021150 1 CH3 N 01171118 CzHsO S (22)--. CH3 S 0.1 100 II 0.01 100 P0 021150 N N fl s hl l S (12,)" CH3 S 0.1 100 \l 0.01 100 O 0.001 30 CQHrO N -CHs N l Gilly-1T 0211 0 (32)... S 061 100 0. 1 (C21I O)2P0 N fl-CHS I (czHsohfi S (42)... C2115 S 0.1 H 0,01 100 il C-H5O N fl N -CH3 l (C2Hs0)2 (52)... 0211:. s or 100 \ll .01 05 1? Calls" i l U llnl) S 0 S 0. I lllll 0.01 100 N 0211 0 N (,II;

I Ulla- H (J31I O S TABLE 2 Continued Myzus test Concentration Degree ofaetive destruction compound in percent Active compound in percent after 24 hours 0. 01 iL 1u 65 CzHr, \NJ-CH3 7% 021550 S (Genom -0W \N CH3 l C2H5Ofi I a (82) 02H: O. 1 100 n 0. 01 99 /PO l C2H5O N i C H 3 (CzHsO) 2F 6 .l /P-O l CzHsO C H zHsolzl 6 1 O 0. 1 100 1: 0. 01 100 (C2H50)2PO*T i' 0. 001 30 l ll N L i a sohfi 11 H I 0. 1 100 a) C 0.01 100 P-O- 0. 001 60 CzHsO CH a I 2Hs0)21 r 6 EXAMPLE 3 Tetranychus test Solvent: 3 parts by weight acetone Emulsifier: l part by weight alkylaryl polyglycol ether After the specified period of time, the effectiveness of the preparation of the given active compound is determined by counting the dead mites. The degree of destruction thus obtained is expressed as a percentage: 100 percent means that all the spider mites are killed, whereas 0 percent means that none of the spider mites are killed.

The particular active compounds tested, their concentrations, the evaluation time and the results obtained can be seen from the following Table 3.

TABLE 3 Concentration of Degree of active destruction compound in percent Active compound in percent alter48hours (A)... CHzO S 0.1 0

\ll /lO- CHzO HN y 1 (Known from US. Patent 2,754,244).

(BO-n C2H5O 0.1 0

ali0 HN N --CH:

(Known from US. Patent 2,754,244). 1 Cl-l s 0.1 100 \II 0.01

""u n CzHsO N on I (Mir-1 1'-.\-- C2I15() N J Cll 21150) S (122)" CH; S 0.1 100 \II 0.01 on P-O-|- CQHSO cm C'zHa N )i CzHsO (3 S 0.1 100 {l 0.01 40 21 5 17 NJ-CH: iHs hfi S CzHs S 0.1 98 \1 O 0. 0l 60 C2H5O 1 on zlis h fi S (53)-" CzHs S 0.1 95

l 0 Ti CzHsO N CH a C2H5\ N /T CJHSO TABLE 3 Continued Concentration of Degree of active destruction compound in percent Active compound in percent after 48 hours 5 (6:) i 0. 1 95 011150 J-CH:

a N 10 A? 0 i (83) CzH5 S 0. 1 100 g 0.01 45 1 C 21150 J L0H 5 CzHgO CH! N (C2H5OMIL (10 (I) 0. 1 100 (C2H50)2IL-O-] N JOE .0 a 2 s )z% O 11 CH S 0. 1 99 a) 3 0. 01 7o .Q C2H5O/ l l EXAMPLE 4 LT test for Diptera Test insect: Musca domestica Solvent: Acetone 2 parts by weight of the particular active compound are dissolved in 1,000 parts by volume of the stated solvent. The resulting solution is diluted with further solvent to the desired lower final concentration.

2.5 ml of the solution of the given active compound are pipetted into a Petri dish. On the bottom of the Petri dish is situated a filter paper with a diameter of about 9.5 cm. The Petri dish remains uncovered until the solvent has completely evaporated. The amount of active compound per square meter of filter paper varies with the concentration of the solution of the given active compound used. About 25 test insects are then placed in the Petri dish and such dish is covered with a glass lid.

The condition of the test insects is continuously ob-. served. The time which is necessary for a 100 percent knock down effect (i.e., lethal time) is determined.

The test insect, the particular active compounds tested, their concentrations, and the period of time at which there is a 100 percent knock down effect can be seen from the following Table 4.

TABLE 4 LTm test for Diptera Concentration of active compound in the solution LTwu Active compound in percent (=minutes) (B) Is/ 0 CQH, 0.2 s hours=100%.

O CgH5 7 o H -i H (Known from U.S. Patent 2,754,244).

(A) fi/OOH; 0.2 8h0urs=70%.

Fl- -P\ 0 CH3- NH CH8 (Known from U.S. Patent 2,754,244).

H 0.02 210'. OP\ 0. 002 8 hours=40%.

O 02H; 0 HS N S H P-C2H5 Il 0. 02 120'. OP 0.002 8 hours=%.

N O CzHs CH3 C2 5)2 (123) v. S CH3 0. 2 45.

0.02 s hours= T S O 02H}! (24) P CH3 0. 2

' 0.02 6 hours=100%. |-o P\ H L O C2H5 a \N/ 1![(O C2115): S

(84) S CgHh 0. 2 70'.

I[L()PO 02H: CHSL 0.02 s hours=80%. CH L- O CgHfi :?-CHa O C2H5 fi Q 0.02 s hours=80%- !O-P\ CH m 0 CzH5 EXAMPLE 5 Mosquito larvae test Test insect Aedes aegypri Solvent: .99 parts by weight acetone Emuisifier: l part by weight benzylhydroxydiphenyl poiygiycoi ether W To produce a suitable preparation of the particular active compound, 2 parts by weight of such active compound are dissolved in 1,000 parts by volume of the stated solvent containing the stated amount of emulsifier, and the resulting solution is diluted with water to the desired final lower concentration.

The aqueous preparations of the given active compounds are placed in glass vessels and about 25 mosquito larvae arethen placed in each glass vessel.

After 24 hours, the degree of destruction is determined as a percentage. 100 percent means that all the larvae are killed, whereas percent means that no larvae at all are killed.

The particular active compounds tested, their concentrations, the test insects and the results obtained can be seen from the following Table 5.

TABLE Mosquito larvae test Concentration of active compound in the Degree oi solution destruction Active compound in p.p.m. in percent (ll) S OCflIs 100 1 0 ;|Oi

0 Calls (J lIs- (Known from U.S. Patent 2,754,244).

(A). S 0 CH: 10 0 II i- P O CH: om-

(Known from U.S. Patent 2,754,244).

S C2Hs 1 100 ll ll 5) N 0 CzHa CH3 N/ l hqCzH: S O CzHs (45). S CzH5 1 100 ll OP\ l N 0 CzHs CH N l .h (0 C2115): S

124).. s CH3 1 100 l FF C 211 a '1 N l 3 N/ ll S O (1:115

TABLE V-QQBELQDfiS Mosquito larvae test Concentration of active compound in the Degree of solution destruction Active compound in p.p.m. in percent ;)..1 s on; 1

o i CH l L 0 C2H5 OJ l L O CzHa CH8 N Ii! (0 C 2H5):

l CH3 N OC2H5 S CH CH -L N oo H 5 N/ 2 6 i (O C 2H5):

EXAMPLE 6 I fl 21102 S 30 g (0.3 moi) of 2-methyl-4-hydroxy-pyrazole are dissolved in 250 ml of acetonitrile, and to this solution are added 60 g (0.6 mol) of triethylarnine. During the subsequent addition of 116 g (0.6 moi) of 0,0 diethyithionophosphoric acid ester chloride, the temperature of the mixture rises. The reaction mixture is heated to 60C for a further 3 hours and stirred overnight at room temperature. The mixture is then taken up in chloroform and the chloroform solution is washed with water. After drying of the organic phase, the reaction product is slightly distilled under greatly reduced pressure and 96 g (80 percent of the theory) of the compound of the above formula with the refractive index n 1.5372, are obtained.

Analysis:

Calculated for C H N,O,P,S,: N 7. i 4

(molecular weight 402) Found: N 6.98

EXAMPLE 7 In analogous manner to that of example 6, the following compounds are obtained:

Yield: 89 percent of the theory; refractive index n Analysis: Calculated for C H N O P S,: 6.02 13.29

(molecular weight 466) Found: 6.67 13.13

(b) fi/CH:

OP\ I N O C2115 CH Yield: 86 percent of the theory; refractive index n 1.5523

Yield: 84 percent of the theory, refractive index: n

Yield: 79 percent of the theory Analysis: S Calculated for c n mo P sz 8.29

(molecular weight 386) Found: 9.10

I 1 Q N O C 2H5 CH3 ifi-C 3 S 0 02115 0) Yield: 86 percent of the theory; refractive index: n

Analysis: P Calculated for C H N O P S 15.35

(molecular weight 404) Found: 15.01

ll O--P\ O C 2115 NP-C 2H5 CH3 Yield: 85.5 percent of the theory; refractive index n,,"" 1.5668

Analysis: P Calculated for c fl mo ms z 14.82

(molecular weight 418) Found: 14.04

ll OP\ O C H N P-(0 02115): 3 ll Yield: 84 percent of the theory; refractive index: m, 1.5363

Analysis: N P S Calculated for C H N- .O -,P S: 6.70%; 14.82%; 7.66%;

(molecular weight 418) Found: 7.22%; 14.37%; 8.35%.

( s/cm I N 0 Q2115 C NP c.H.

: S O CgH5 Yield: 84 percent of the theory; refractive index: n,, 1.5244

Analysis: N

Calculated for C,,H N,O,P,S,: 7.86%;

(molecular weight 356) Found: 7.1 1%.

Yield: 72 percent of the theory, refractive index: n 1.5418

Analysis: P S

Calculated for C,,H O,N,P,S: 16.77%; 8.65%;

(molecular weight 370) Found: 16.59%; 8.42%.

yl)--methyl-pyrazol -3-yl]-thionophosphoric acid ester 4 ethyl-O-ethyl-O-[ l (O,O'diethylthionophosphoryl )-5-methyl-pyrazol-3-yl thionophosphonic acid ester 5. ethyl-O-ethyl-O-[ l(ethyl-O'-ethylthionophosphonyl)-5-methyl-pyrazol-3-yl]- thionophosphonic acid ester phenyl-O-ethyl-O-[ l-( methyl-O-ethylthionophosphonyl)-5-methyl-pyrazol-3-yl]- thionophosphonic acid ester 7. phenyl-O-ethyl-O-[ l-(ethyl-O-ethylthionophosphonyl)-5-methyl-pyrazol-3-yl]- thionophosphonic acid ester 8. ethyl-O-ethyl-O-[ l-(O',O'-diethyl-phosphoryl)-5- methyl-pyrazol 3-yl]-thionophosphonic acid ester 9. phenyl-O-ethyl-O-[ l-(O',O'-diethyl-phosphoryl- 5-methyl-pyrazol-3yl]-phosphonic acid ester methyl-pyrazol3-yl]-phosphoric acid ester 1 1 yl )-5-methyl-pyrazol-3 -yl] -thionophosphonic ester methyl-O-ethyl-O-[ 1-(O',O'-diethyl-phosphoracid I thionophosphonyl)-5-methyl-pyrazol-3-yl]- thionophosphonic acid ester 1 3. 0,0-diethyl-O-[ l-(phenyl-O-ethylthionophosphonyl)-5-methyl-pyrazol-3-yl]- thionophosphoric acid ester 14. phenyl-O-ethyl-O-[ 1-(O,O'-diethyl-phosphoryl- 5-methyl-pyrazol-3-yl l-thionophosphonic acid ester 15. phenyl-O-ethyl-O-[ 1-( phenyl-O-ethylthionophosphonyl )-5-methyl-pyrazol- 3 -yl thionophosphonic acid ester 16. 0,0-diethyl-O-[ l-(O',O'-diethyl-phosphoryl)-5- methyl-pyrazol-3-yl]-thionophosphoric acid ester It will be realized that all of the foregoing compounds contemplated by the present invention possess the desired selective pesticidal, especially arthropodicidal, i.e., insecticidal or acaricidal, properties for combating insects and acarids, and that such compounds have a low phytotoxicity and a correspondingly low mammalian toxicity.

As may be used herein, the terms arthropod,.

arthropodicidal and arthropodicide contemplate specifically both insects and acarids. Thus, the insects and acarids may be considered herein collectively as arthropods to be combated in accordance with the invention, and accordingly the insecticidal and/0r acar- 5 icidal activity may be termed arthropodicidal activity, and the concomitant combative or effective amount used will be an anhropodicidally effective amount which in effect means an insecticidally or acaricidally effective amount of the active compound for the desired purposes.

It will be appreciated that the instant specification and examples are set forth by way of illustration and not limitation, and that various modifications and changes may be made without departing from the spirit and scope of the present invention which is to be limited only by the scope of the appended claims.

What is claimed is:

1. Phosphorus acid ester of the formula 0-1 CH i if \R2 in which R and R each individually is alkoxy of one to four carbon atoms, R and R each individually is selected from the group consisting of alkyl of one to four carbon atoms, alkoxy of one to four carbon atoms and phenyl, and X and Y each individually is selected from the group consisting of oxygen and sulfur.

2. Compound according to claim 1 wherein R and R, each individually is alkoxy of one to three carbon atoms, R and R each individually is selected from the group consisting of alkyl of one to three carbon atoms, alkoxy of one to three carbon atoms and phenyl, and X and Y each individually is selected from the group consisting of oxygen and sulfur.

3. Compound according to claim 1 wherein R and R, each individually is methoxy or ethoxy, R and R each individually is selected from the group consisting of methyl, ethyl, methoxy, ethoxy and phenyl, and X and Y each individually is selected from the group consisting of oxygen and sulfur.

4. Compound according to claim 1 wherein such compound is methyl-O-ethyl-O-[1-(methyl-O'-ethylthionophosphonyl)-5- methyl-pyrazol-3-yl1- thionophosphonic acid ester of the formula 5. Compound according to claim 1 wherein such compound is methyl-O-ethyl-O-[l-(O,O'-diethylthionophosphoryl)-5- methyl-pyrazol-3-yl1- thionophosphonic acid ester of the formula e s h l T S 7. Compound according to claim 1 wherein such compound is phenyl-O-ethyl-O-[l-(methyl-O-ethyl- I thionophosphonyl)--methyl-pyrazol-- thionophosphonic acid ester of the formula c H3;1ITN c 21150 s 8. Compound according to claim 1 wherein such compound is ethyl-O-ethyl-O-[l-(O',O'-diethylphosphoryl)-5-methylpyrazol-3-yl]-thionophosphonic acid ester of the formula 9. Compound according to claim 1 wherein such compound is 0,0-diethyl-O-[ l-O,O'-diethylphosphoryl)-5-methyl-pyrazol-3-yll-phosphoric acid ester of the formula 10. Compound according to claim 1 wherein such compound is 0,0-diethyl-O-[l-(phenyl-O'-ethylthionophosphonyl)-5-methyl-pyrazol-3-yl]- thionophosphoric acid ester of the formula s ll 

2. Compound according to claim 1 wherein R1 and R3 each individually is alkoxy of one to three carbon atoms, R2 and R4 each individually is selected from the group consisting of alkyl of one to three carbon atoms, alkoxy of one to three carbon atoms and phenyl, and X and Y each individually is selected from the group consisting of oxygen and sulfur.
 3. Compound according to claim 1 wherein R1 and R3 each individually is methoxy or ethoxy, R2 and R4 each individually is selected from the group consisting of methyl, ethyl, methoxy, ethoxy and phenyl, and X and Y each individually is selected from the group consisting of oxygen and sulfur.
 4. Compound according to claim 1 wherein such compound is methyl-O-ethyl-O-(1-(methyl-O''-ethyl-thionophosphonyl)-5- methyl-pyrazol-3-yl)-thionophosphonic acid ester of the formula
 5. Compound according to claim 1 wherein such compound is methyl-O-ethyl-O-(1-(O'',O''-diethyl-thionophosphoryl)-5- methyl-pyrazol-3-yl)-thionophosphonic acid ester of the formula
 6. Compound according to claim 1 wherein such compound is O,O-diethyl-O-(1-(O'',O''-diethyl-thionophosphoryl)-5-methyl- pyrazol-3-yl)-thionophosphoric acid ester of the formula
 7. Compound according to claim 1 wherein such compound is phenyl-O-ethyl-O-(1-(methyl-O''-ethyl-thionophosphonyl)-5-methyl-pyrazol- -thionophosphonic acid ester of the formula
 8. Compound according to claim 1 wherein such compound is ethyl-O-ethyl-O-(1-(O'',O''-diethyl-phosphoryl)-5-methyl- pyrazol-3-yl)-thionophosphonic acid ester of the formula
 9. Compound according to claim 1 wherein such compound is O,O-diethyl-O-(1-O'',O''-diethyl-phosphoryl)-5-methyl-pyrazol-3-yl)-phosphoric acid ester of the formula
 10. Compound according to claim 1 wherein such compound is O,O-diethyl-O-(1-(phenyl-O''-ethyl-thionophosphonyl)-5-methyl-pyrazol-3-yl) -thionophosphoric acid ester of the formula 